How would you answer an interview scenario involving Adapter pattern?

For an interview scenario involving Adapter pattern, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. Adapter translates one interface into another interface expected by the application. In this scenario, integrate two payment gateways with different request and response models behind one application interface. For production, map external models at the edge, normalize errors, protect timeouts, and keep the internal contract stable. I would then explain the main alternatives and tradeoffs, identify likely failure modes, and describe how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.